1 files changed, 3 insertions, 0 deletions
diff --git a/iseq.c b/iseq.c
index a4da78496c..382ddec437 100644
--- a/iseq.c
+++ b/iseq.c
@@ -2336,6 +2336,9 @@ rb_iseq_trace_set(const rb_iseq_t *iseq, rb_event_flag_t turnon_events)
 #else
 	const VALUE *code = iseq->body->iseq_encoded;
 #endif
+	if (iseq->flags & ISEQ_USE_COMPILE_DATA) {
+	    rb_bug("ISEQ_USE_COMPILE_DATA should not be enabled: %s:%d\n", RSTRING_PTR(rb_iseq_path(iseq)), FIX2INT(rb_iseq_first_lineno(iseq)));
+	}
 	((rb_iseq_t *)iseq)->aux.trace_events = turnon_events;
 
 	for (i=0; i<iseq->body->iseq_size;) {